ALTERATION GUIDE FOR STEPPED CORE PINS
Applicable Products
Applicable Products
Items
Items
Alterations
Code
Specifications
Alterations
Code
Specifications
Key flat cutting
Single flat cutting Range of designation (DorP)/2 ≦ KC ＜ H/2
Extra precision One–Step Core Pins Taperless One–step One–step/ Two–step Core pins Taperless One–step/ Two–step Standard One–Step Core Pins Taperless One–step Standard One–Step Core Pins One–Step Core Pins Taperless One–step
When the key flat size is shaft diameter/2
KC
Full length tolerance alteration L + 0.01 0
+ 0.005 0
L
L
－ 0.01 KC 0
Designation method LKC (L designation in 0.005mm increments possible) E Available when 1.5 ≦ (DorP) ≦ 5 E Available for Shape S/C/T/R X Combination with FC not available
LKC
Key flat cutting
Length alteration
Two flats cutting Range of designation (DorP)/2 ≦ WKCH/2
WKC
L
－ 0.01 WKC 0
KC
AC ° AC ° One-Step Core Pins Two-Step Core Pins
One–Step Core Pins Two–Step Core Pins Taperless One–step Taperless Two–step
Key flat cutting
Unit of designation Shaft diameter selection type (D/2) ……………………………………… 0.05 mm increments possible Shaft diameter designation (0.01 mm increments) type (P/2) …………………………………… 0.005 mm increments possible Shaft diameter designation (0.005 mm increments) type (P/2) …………………………………… 0.0025 mm increments possible Shaft diameter designation (0.001 mm increments) type (P/2) …………………………………… 0.0005 mm increments possible Designation method • KC2.61 (When P5.22) • WKC3.0875 (When P6.175) • RKC2.7425 (When P5.485) • DKC3 (When D6) • SKC2.5 (When D5) • KGC1.5–AG125 (When D3) • KTC3.085 (When P6.17) To designate an arbitrary flat size
Varied width parallel flats cutting Range of designation (DorP)/2 ≦ KAC KAC ＜ KBC ＜ H/2 Two flats (right angled) cutting Range of designation (DorP)/2 ≦ RKC ＜ H/2
Changes the standard angle Ks ＝ 45° in the range of 30° ≦ AC ≦ 60° Range of designation 30 ≦ AC ≦ 60 Unit of designation 1° increments Designation method AC40
Step1 CC/CD
Step C/D
Step1 CC/CD
Step 1C/1D
KAC KBC
• A + 2(C × tanAC) < DorP • C ≦ 1.0 ※ Only when 1D/D/CD is designated x Combination with CVC not possible
AC
KAC － 0.01 0
KBC － 0.01 0
Applicable conditions
Taperless One–step core pins
Taperless Two–step core pins
Key flat cutting
AC °
AC °
x Combination with CVC/RC not possible
RKC
－ 0.01 RKC 0
R shape alteration (enlargement) Range of designation 0.5 ≦ RE ≦ 2.0 Unit of designation 0.5mm increments
Key flat cutting
Three flats cutting Range of designation (DorP)/2 ≦ DKC ＜ H/2
RE
+ 0.05
E F tolerance is
0 .
DKC
E Available for Step 1E/E
Designation method RE1.0
0
DKC
DKC － 0.01
RR
RR
Key flat cutting
Changes R (normally 0.2 or less) to R0.3–0.5 (improves strength) Designation method RR
Four flats cutting Range of designation (DorP)/2 ≦ SKC ＜ H/2
1C
1B
E R dimension designation not possible
SKC
RR
RR
－ 0.01 0
E Available for Step 1B/1C/1D E (DorP) −A ≧ 1.0
SKC
E When Step D, C ≧ 0.5
1D
Key flat cutting (angled) ± 0.5 0 ° AG °
Aside from reference plane (0°), an angle for key cutting can be specified. Range of designation (DorP)/2 ≦ KGC ＜ H/2 0 ＜ AG ＜ 360 AG = 1° increments
CVC ± 0.02
C dimension can be designated at 0.01mm increments Unit of designation 0.01mm increments Designation method CVC0.25 E Available for Step D x Combination with AC not available (tapered only)
KC
45 °
Range of designation Standard : 0.50 ≦ CVC ≦ 1.00 Precision/Extra precision: 0.10 ≦ CVC ≦ 1.00 CVC ＜ [(DorP)–A]/2 Taperless One–step : 0.10 ≦ CVC ≦ 1.00
KGC
Unit of designation 0.1mm increments Designation method • KC1.4 • WKC2.3 • KAC1.4–KBC1.6
CVC
KGC
Key flat cutting (angled)
A dimension alteration
Enlarges Amin. up to AACmin. D (No.) Amin.
120 °
• RKC1.4 • DKC1.7 • SKC5.8 • KGC1.4–AG85 • KTC2.3
Unit of designation Standard: 0.01mm increments Precision: 0.01mm increments Extra precision: 0.001mm increments Designation method AAC 0.40 E ℓ ≦ 10 × AAC
Head alteration One–step/ Two–step Core pins
Three flats cutting at 120° Range of designation (DorP)/2 ≦ KTC ＜ H/2
AACmin.
120 °
KTC
1–1.5 3.5–4
0.50 1.00 1.50 2.00 5.00
0.40 0.70 1.00 1.50 4.00
Taperless One–step
120 °
AAC
5.5
Key flat cutting range tolerance is 0 –0.01 ※ Core Pin for Die Casting is 0 –0.1
－ 0.01 0
KTC
6–16
20
Shape alteration
Head diameter change
Reduces the head diameter. Range of designation (DorP) ≦ HC ＜ H Unit of designation 0.1mm increments Designation method HC6.5 E In relation to the head diameter tolerance, alteration may create a straight piece with little diameter difference between the head and shaft.
Taperless One–step/ Two–step
X Regarding D(No.) = 2–3, 4.5 and 5, Amin. is the machining limit and AAC cannot be used. E NAK material available for D(No.) ≧ 3.5 E For Lapped type products, refer to the Catalog Page.
HC
V dimension change
Enlarges working limits for Vmin. D (No.) Vmin.
Unit of designation Standard: 0.01mm increments Precision: 0.01mm increments Extra precision: 0.005mm increments Designation method VC0.56 E ℓ ≦ A × 5, ℓ ≦ 50 (For Step 1A, A c DorP) E When Lapped type, refer to the Catalog Page for each product
VCmin.
1–1.5 3.5–4
0.50 1.00 1.50 2.00
0.40 0.70 1.00 1.50
One–Step Core Pins
VC
Head diameter change (precision)
5.5
Reduces the head diameter. (Precision) Range of designation (DorP) + 0.5 ≦ HCC ＜ H–0.3 Unit of designation 0.1mm increments Designation method HCC6.1 Reduces the head thickness to less than standard. Dimensions L, Y, F remains unchanged Range of designation 1.5 ≦ TC ＜ 4 Unit of designation 0.1mm increments Designation method TC3.5
6–10
20 4.00 X Regarding D(No.) = 2–3, 4.5, 5/13–16, Vmin. is the machining limit and VC cannot be used 5.00
HCC
Taperless One–step RC
Head thickness change
Precision Extra precision Taperless One–step/ Two–step Precision Extra precision One–Step/Two–Step Core Pins Taperless One–step/ Two–Step Precision Taperless two–step Standard Precision Two–Step Core Pins Taperless Two–step (Precision only)
Changes R (normally ≦ 0.1) to R ≦ 0.05 Designation method RC
Taperless Two–step
B
RC
45 °
RC
RC
TC
E Available for Taperless One–Step Core Pins Step B/C/D E Available for Taperless Two–Step Core Pins Step2 B
C
B
0
TC
－ 0.02
45 °
RC
4
D
Relief under the head
TRN Adds a relief under the head, making the plate chamfering unnecessary. Designation method TRN
F dimension becomes shorter than Fmin. Make L dimension shorter than Lmin. too. Range of designation 5.00 ≦ FC ≦ Fmin. Unit of designation 0.01mm increments Designation method FC6.00 E When FC code is used, it can be designated up to Lmin. = 6.5mm.
FC
FC
Changes the head lower part R (normally R0.3 or less) to R0.3–0.5 Designation method TRC E Available for Free designation one–step core pins Numbering at the back part of the head Marking of ID code at the back of the head. (Round–Gothic type angled at about 1.8) Available characters Numerals 10 types 0–9 , Alphabets 26 types A–Z Range of designation 1 character when 2 ≦ H ≦ 4.9
F
TRC
QC
Changes R (normally ≦ 0.1) to R ≦ 0.05 Designation method QC E Available for Step1 CB
Numbering at the back part of the head
QC
Changes the standard angle (Z = 45°) in the range of 30° ≦ AGC ≦ 60°. Range of designation 30 ≦ AGC ≦ 60 Unit of designation 1° increments Designation method AGC35
AGC °
2 or less characters when 5 ≦ H ≦ 6.9 (Only the first character may be an alphabet.) 3 or less characters when 7 ≦ H (Only the first character may be an alphabet) E Note that depending on the specified characters, if the space indicated in the table below does not exists on the head, it may not be possible to carry out numbering machining. Unit: mm Character Height Character Width 1–character 2.3 2.7 2–character 2.3 5.0 3–character 2.3 7.3
A15
E Available for Step2 CC/CD/C/D E Machining limit of Step2 D: A + 2(C × tanAGC°) ＜ V E When Step2 CD, J + 2(G × tanAGC°) ＜ V
AGC
8
NHC
Gas vent machining
Gas vent machining Range of designation 2 ≦ GS ≦ 10, GS + 2 ≦ GB ≦ 30
2 － R ≦ 0.2
D or P
t
2.00–4.99 5.00–9.99
0.1 0.2 0.3
10.00–20.00 Unit of designation 1mm increments Designation method GVC–GS3–GB20 E Available when Fmin. ≦ F–GB, D or P ≧ 2.00 E For details of "Steps–Type Round Core Pins (Gas Release)" which is a product similar to alteration GVC, D refer to Misumi–VONA
GVC
Common
E Available when head diameter H ≧ 2 X Combination with SKC not available
GS
365
366
GB
Shaft alteration
Desig nation method NHC−6 NHC−23 NHC−A90
F
E Note that when the alteration dimension specified for the flat cut is (H/2–0.15) or more, there will be almost no flat surface on the head.
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